Moved database initialization to its own script

roles/mariadb/scripts/initialize_db.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+mysql -uroot -pgeheim --host 127.0.0.1 << EOF
+CREATE DATABASE IF NOT EXISTS KEYSTONE;
+GRANT ALL PRIVILEGES ON KEYSTONE.* TO 'keystone'@'localhost' IDENTIFIED BY 'keystone';
+GRANT ALL PRIVILEGES ON KEYSTONE.* TO 'keystone'@'%' IDENTIFIED BY 'keystone';
+EOF